uva 1586 Molar mass

来源：互联网发布：峡山淘宝运营培训编辑：程序博客网时间：2024/06/05 06:32
#include<iostream>#include<cstdio>#include<cstring>using namespace std;int change(char ch){    return ch-'1';}int main(){    int t;    cin>>t;    while(t--)    {        string a;        cin>>a;        double m=0;        double sum=0;        double c[100],d[100];        memset(c,0,sizeof(c));        for(int i=0;i<(int)a.length();i++)            d[i]=1;        if((int)a.length()==1)        {            if(a[0]=='C') {sum=12.010;m=0;}            if(a[0]=='H') {sum=1.008;m=0;}            if(a[0]=='O') {sum=16.000;m=0;}            if(a[0]=='N') {sum=14.010;m=0;}        }        else        {            for(int i=0;i<(int)a.length();i++)            {                if(a[i]=='C') {c[i]=12.010;m=0;}                else if(a[i]=='H') {c[i]=1.008;m=0;}                else if(a[i]=='O') {c[i]=16.000;m=0;}                else if(a[i]=='N') {c[i]=14.010;m=0;}                else                {                    if(m==0) {d[i-1]+=change(a[i]);m=1;}                    else{d[i-2]=d[i-2]*10+(a[i]-'0');}                }            }        }        for(int i=0;i<(int)a.length();i++)        {            if(c[i]) sum+=c[i]*d[i];        }        printf("%.3f\n",sum);    }    return 0;}
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